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The 5-HT 2A receptor is a subtype of the 5-HT 2 receptor that belongs to the serotonin receptor family and is a G protein-coupled receptor (GPCR). [4] The 5-HT 2A receptor is a cell surface receptor, [5] but has several intracellular locations. [6] Like all 5-HT 2 receptors, the 5-HT 2A receptor is G q /G 11-protein coupled.
5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in the central and peripheral nervous systems. [ 1 ] [ 2 ] [ 3 ] They mediate both excitatory and inhibitory neurotransmission .
The 5-HT 2 receptors are a subfamily of 5-HT receptors that bind the endogenous neurotransmitter serotonin (5-hydroxytryptamine, 5-HT). [1] The 5-HT 2 subfamily consists of three G protein-coupled receptors (GPCRs) which are coupled to G q /G 11 and mediate excitatory neurotransmission , [ 2 ] including 5-HT 2A , 5-HT 2B , and 5-HT 2C .
The 5-HT 5B receptor is present in rodents but not in humans. In addition to the serotonin receptors, serotonin is an agonist of the trace amine-associated receptor 1 (TAAR1) in some species. [43] [44] It is a weak TAAR1 partial agonist in rats, but is inactive at the TAAR1 in mice and humans. [43] [44]
Brain at the U.S. National Library of Medicine Medical Subject Headings (MeSH) (view tree for regions of the brain) BrainMaps.org; BrainInfo (University of Washington) "Brain Anatomy and How the Brain Works". Johns Hopkins Medicine. 14 July 2021. "Brain Map". Queensland Health. 12 July 2022.
The VTA contains 5-HT 1A receptors that exert a biphasic effects on firing, with low doses of 5-HT 1A receptor agonists eliciting an increase in firing rate, and higher doses suppressing activity. The 5-HT 2A receptors expressed on dopaminergic neurons increase activity, while 5-HT 2C receptors elicit a decrease in activity. [ 39 ]
The CTZ is located within the area postrema, which is on the floor of the fourth ventricle and is outside of the blood–brain barrier. [1] It is also part of the vomiting center itself. [ 2 ] The neurotransmitters implicated in the control of nausea and vomiting include acetylcholine , dopamine , histamine (H1 receptor), substance P (NK-1 ...
Receptors are located throughout the body including the skin, epithelia, internal organs, skeletal muscles, bones, and joints. The cutaneous receptors of the skin project in an orderly fashion to the spinal cord , and from there, via different afferent pathways ( dorsal column-medial lemniscus tract and spinothalamic tract ), to the ventral ...